MADRID (AP) — Madrid’s mayor on Wednesday rebuked Spanish pop star Rosalia for briefly unleashing pandemonium earlier this week by convening a flash mob that prompted riot police to control the rowdy, impromptu gathering.

The Barcelona-born singer and songwriter gave about an hour’s notice to her social media followers that she would be downtown Monday night to promote the launch of her new album, “Lux”. Thousands of people flocked there in time to see the Grammy winner make a quick appearance while the album cover was shown on a large screen. Fans chased after Rosalía along a busy main road as she dashed from a car and into a hotel.

Officials deployed several police units to control traffic and closed a nearby metro station. City Hall is evaluating whether the singer could be fined for

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